EP 1042731 A1 20001011 - CONTACT/CONTACTLESS SMART CARD HAVING CUSTOMIZABLE ANTENNA INTERFACE
Title (en)
CONTACT/CONTACTLESS SMART CARD HAVING CUSTOMIZABLE ANTENNA INTERFACE
Title (de)
KONTAKTCHIPKARTE/KONTAKTLOSE CHIPKARTE MIT ABÄNDERUNGSFÄHIGER ANTENNENSCHNITTSTELLE
Title (fr)
CARTE A MEMOIRE AVEC/SANS CONTACT POURVUE D'UNE INTERFACE ANTENNE PERSONNALISABLE
Publication
Application
Priority
- IL 9800624 W 19981228
- IL 12284197 A 19971231
Abstract (en)
[origin: US6161762A] A data transaction device having a contactless mode of operation and comprising an antenna coil coupled to a processing unit via an antenna interface for allowing contactless data transmission between the data transaction device and a remote transceiver. A circuit within the antenna interface includes a modulator for modulating a signal transmitted by the remote transceiver and received by the antenna coil with outgoing data generated by the processing unit for transmitting via the antenna coil to the remote transceiver. The circuit further includes a variable loading circuit connected in series with a load seen by the antenna coil and having a capacitance connected across the load so as to effect a change in impedance of the load seen by the antenna coil thus allowing amplitude and/or phase modulation of said signal without complete interruption thereof and regardless of the magnitude of an external capacitance connected across the load. Preferably, the antenna interface may be customized for different applications and the data transaction device also includes a contact field thus allowing for either contact or contactless communication.
IPC 1-7
IPC 8 full level
G06K 19/07 (2006.01)
CPC (source: EP US)
G06K 19/0723 (2013.01 - EP US); G06K 19/07769 (2013.01 - EP US)
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
DOCDB simple family (publication)
WO 9934326 A1 19990708; AT E206542 T1 20011015; AU 1576199 A 19990719; AU 749011 B2 20020613; CA 2318538 A1 19990708; CA 2318538 C 20040511; DE 69801926 D1 20011108; DE 69801926 T2 20020613; EP 1042731 A1 20001011; EP 1042731 B1 20011004; HK 1028286 A1 20010209; IL 122841 A0 19980816; US 6161762 A 20001219
DOCDB simple family (application)
IL 9800624 W 19981228; AT 98960081 T 19981228; AU 1576199 A 19981228; CA 2318538 A 19981228; DE 69801926 T 19981228; EP 98960081 A 19981228; HK 00107428 A 20001121; IL 12284197 A 19971231; US 22116098 A 19981228